beam propagation造句

• Interference simulation of laser beam propagation in turbulent atmosphere
  激光在湍流大气中的干涉仿真
• Angle - of - arrival fluctuation of light beam propagation in strong turbulence regime
  光束在强湍流区中传播的到达角起伏
• The results in two cases are connected inherently by fresnel number , which plays a key role in focused beam propagation
  文中还利用fresnel数对两种传输过程的关系和聚焦光束的传输特性作了分析。
• Chaper 4 , the numerical solution of nnlse for the single beam propagation in the nonlocal kerr media is presented
  第四章，是硕士期间协助导师所作的工作。通过对nnlse进行数值模拟，求得了单光束传输的数值解。
• In this , we focus on the phenomena of the induced focusing when two beams propagation in self - defocusing nonlinear media in an off - axis geometry
  本论文旨在研究三维自散焦介质中由交叉相位调制效应诱导的光束聚焦。
• Lasers and laser - related equipment - test methods for laser beam widths , divergence angles and beam propagation ratios - general astigmatic beams
  激光和激光相关设备.激光束宽度发散角和束扩散率的试验方法.一般象散束
• In chapter 2 , we discuss the optics self - focusing in beam propagation . the early research was based on the scalar approximation and paraxial approximation
  早期的自聚焦研究是在考虑了傍轴近似和标量场近似的前提下得到的。
• Lasers and laser - related equipment - test methods for laser beam widths , divergence angle and beam propagation ratios - part 2 : general astigmatic beams
  激光和激光相关设备.激光束宽度发散角和束扩散率的试验方法.第2部分:一般像散束
• Then numerical algorithms are used to analyze integrated optical wave - guide and beam propagation method is a good method which is widely used
  于是出现了用数值分析方法来分析集成光波导。其中，光束传播法就是分析光波导器件的一种好方法。
• Lasers and laser - related equipment - test methods for laser beam widths , divergence angles and beam propagation ratios - stigmatic and simple astigmatic beams
  激光和激光相关设备.激光束宽度发散角和束扩散率的试验方法.无象散和简单象散束
• The simulation using the bi - directional beam propagation method proves that the demultiplexer can have very low insertion loss and high isolation ratio
  藉由双向光束传播法来仿真此组件，结果显示此解多任务器具有很低的插入损耗和高的隔离度。
• Lasers and laser - related equipment - test methods for laser beam widths , divergence angle and beam propagation ratios - part 1 : stigmatic and simple astigmatic beams
  激光和激光相关设备.激光束宽度发散角和束扩散率的试验方法.第1部分:无象散和简单象散束
• The traditional beam propagation algorithm based on fast fourier transform fails to give right results due to the limitation of the sampling theorem
  由于取样定理的限制，常规的基于快速傅里叶变换( fft )光束传输模拟算法不能进行任意焦距聚焦光束的传输过程的模拟。
• Using the beam propagation method ( bpm ) simulation , we confirm that wide controllability of the branching ratio and low excess loss can be realized by this structure
  用bpm方法模拟的结果表明，此结构实现了50 - 94的不对称分支比，并且具有低的附加损耗的特点。
• As for waveguide components such as awgs , beam propagation method ( bpm ) and transparent boundary condition ( tbc ) are powerful tools to do computer - aided modeling , giving direct results
  对于awg这样一种波导器件，采用光束传播算法( bpm )和透明边界条件( tbc )进行数值模拟，可以给出直观、清晰的结果。
• During these processes , diffraction , self - phase modulation , cross - phase modulation and physical distance between the beam centers all have important effects on the beams and the pulse beams propagation
  在这些过程中，衍射、自相位调制、交叉相位调制、光束之间的间距等都对光束和脉冲光束在非线性介质中的传输产生重要的影响。
• First , i made and improved some beam propagation method ( bpm ) programs , consisting of 2d ( eim - bpm ) and 3d bpm , with transparent boundary condition ( tbc ) and perfectly matched layer ( pml ) boundary condition respectively
  首先建立了光束传播法( bpm )的模拟平台，解决了边界问题。利用建立的三维bpm平台设计了渐变折射率波导的mmi耦合器。
• For coupling loss , the method to reduce this loss is pointed out without changing other structural parameters decided by the above requirements . y - branch loss is analyzed by bpm ( beam propagation method )
  对于耦合损耗，指出了在不改变前面结构参数(因为它们的设计是根据半波电压和单模要求设定的)情况下，实现小耦合损耗的方法。
• Besides the scalar diffraction theory , the simulation method of beam propagation method , which is extensively used in the simulation of integrated optical devices , is also discussed though no successful result of calculation with bpm is given
  本文给出了平场输入和输出edg的设计方法，并利用标量衍射理论对设计的结果进行模拟，验证了平场输出edg具有很好的分波效果。
• The effective index method is applied to simplify an awg structure from 3d to 2d . two simulation methods are presented in detail based on the gaussian beam propagation formula and the finite difference beam propagation method
  文中采用等效折射率方法把三维结构简化为二维结构，然后分别基于高斯光束的传播和有限差分光束传播方法( fd - bpm ) ，给出了两种对整个awg进行全局模拟的具体方法。